新穎之非線性吸收型光功率限幅材料研究:分子設計、合成與物性鑑定;Novel Nonlinear-Absorption-Based Optical Power-Limiting Materials: Molecular Design, Synthesis and Characterization

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/62425

Title:	新穎之非線性吸收型光功率限幅材料研究:分子設計、合成與物性鑑定;Novel Nonlinear-Absorption-Based Optical Power-Limiting Materials: Molecular Design, Synthesis and Characterization
Authors:	林子超
Contributors:	國立中央大學化學系
Keywords:	化學;醫學工程
Date:	2013-12-01
Issue Date:	2014-03-17 11:32:27 (UTC+8)
Publisher:	行政院國家科學委員會
Abstract:	研究期間：10208~10307;Multi-photon absorbing materials are of significant interest to the academic community, industry, and military for numerous applications including optical power limiting, frequency up-conversion, IR to visible optical-optical conversion, 3D data storage, photodynamic therapy and noninvasive bio-imaging. Since the commercialized materials are not good candidates for these applications because of their comparatively poor nonlinear absorption properties, it is very important to develop and explore new multi-photon absorbing materials with strong optical nonlinearity coupled with enhanced structural flexibility, ease of processing, low cost and large-scale manufacturability for the practical usage. In order to approach this goal, well-defined structure-property relationships must be established. This requires an investigation of large number of different molecules with systematical alteration of molecular structural parameters by reliable characterization methods. With the aid of two-photon-excited fluorescence (2PEF) technique for the degenerate nonlinear absorption spectra measurement, it is possible to explore the dispersion of multi-photon absorbing of the studied compounds within a certain spectral range. The data obtained by these techniques provide very useful information for us to study the structure-nonlinear absorption property relationships. This two-year Proposal is composed of three correlative parts: I. Molecular Design and Synthesis of Nonlinear Absorbing Chromophores; II. Linear and Nonlinear Optical Property Characterizations; III. Investigation of The Connections Between Molecular Structures and Effective Optical Power-Limiting Properties In order to explore the structural effects on the molecular nonlinear absorption behaviors, we intend to develop three classes of multi-branched/dendritic -systems for this study: (i) Novel heteroaromatic-ring containing structures based on tetra-substituted ethylene scaffold; (ii) Novel dendritic chromophores with generic structures of D--A and D--A--D; (iii) Novel star-shaped chromophores derived from triquinoxalinylamine. For nonlinear optical properties characterization, both the methods that utilize 2PEF across various excitation wavelengths to probe the spectral response of nonlinear absorption will be conducted. Nonlinear wave-mixing technique will be used for exploration of two-photon-assisted excited-state dynamics. The study of optical power limiting properties of the proposed materials is planned to be carried out under the irradiation of nanosecond laser pulses. This two-year continuous research involves multidisciplinary efforts including materials design, chemical synthesis, and optical properties characterization. In this research, we also aim to purchase and build up a mode-locked Ti:Sapphire laser system in order to essentially and independently measure the two-photon absorption spectra and probe the excited-state dynamics. At the same time, we will continuously work with our \ international collaborators very closely to explore other nonlinear optical properties which may have potential for the applications. The detail works involved in this Proposal and the plan of carrying out the proposed research on the yearly basis is described in detail in the text body of this Proposal.
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Department of Chemistry] Research Project

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	384	View/Open

社群 sharing

Loading...